不同混合浪表征方法下港内波况数值模拟  

Numerical simulation of sea state within harbor forced by mixed waves characterized by different methods

作　　者：申明航 郑振钧 董华韦 郑艳娜 马小舟[1] 董国海[1] SHEN Minghang;ZHENG Zhenjun;DONG Huawei;ZHENG Yanna;MA Xiaozhou;DONG Guohai(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China;Key Laboratory of Port,Waterway&Sedimentation Engineering,Ministry of Communications,Nanjing 210029,China;School of Ocean and Civil Engineering,Dalian Ocean University,Dalian 116023,China)

机构地区：[1]大连理工大学,海岸和近海工程国家重点实验室,辽宁大连116024 [2]港口航道泥沙工程交通行业重点实验室,江苏南京210029 [3]大连海洋大学海洋与土木工程学院,辽宁大连116023

出　　处：《水运工程》2024年第11期48-55,91,共9页Port & Waterway Engineering

基　　金：国家自然科学基金面上项目(52071060);国家自然科学基金青年科学基金项目(52301312);港口航道泥沙工程交通行业重点实验室开放基金项目(Yk223001-5);中央高校基本科研业务费资助项目(DUT22LAB101、DUT22RC(6)006);辽宁省教育厅资助项目(LJKZ0717)。

摘　　要：以一组波浪参数描述波浪的总体表征法在精确表征混合浪时具有局限性,通过将波浪频谱划分为独立波系并以参数化形式表征每个波系的多波系表征法,可以更精确地表征混合浪。通过数值模拟方法探讨混合浪的不同表征方法对港内水体扰动的影响,运用不同的表征方法对秘鲁钱凯湾的3个实测波浪谱进行重构,作为数值模拟的输入波谱,并且检验总体表征法在描述混合浪时引入的典型误差。结果表明,长涌浪波系对港内水体扰动有显著影响,对其能量水平的高估或低估会导致相应的误差;与多波系表征法相比,总体表征法得到的平均波向往往与实际情况不符,会导致对防波堤掩护效果的误判。The overall characterization method of waves using a single set of wave parameters has limitations when representing mixed waves accurately.By using multimodal characterization method to partition the wave spectrum into independent wave systems and representing each system in a parameterized form,mixed waves can be more accurately characterized.We investigate the influence of mixed waves condition characterization methods on water agitation in harbor through numerical simulation.We select three measured wave spectra of Chancay Harbor in Peru to theoretically reconstructed under different characterization methods,serving as input spectra for numerical models,and examine the typical errors introduced by the overall characterization method in describing mixed waves.The results show that wave conditions within the harbor are significantly impacted by the long swell system,and overestimation or underestimation of its energy levels leads to corresponding errors.Compared to the multimodal characterization method,the overall characterization method often yields average wave directions that do not align with reality,resulting in a misjudgment of the protective effect of breakwaters.

关 键 词：混合浪 水体扰动 总体表征法 多波系表征法 双峰谱 

分 类 号：O353.2[理学—流体力学] U652.3[理学—力学]